Flame-monitoring device

Details Flame-monitoring device Flame-monitoring device

2006-05-16

2006-05-16

Mullen, Thomas (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S587000, C431S075000

Reexamination Certificate

active

07046154

ABSTRACT:
The invention relates to a flame-monitoring device in which an a.c. input voltage (U1) is limited to a voltage limit (U2) by means of a voltage limiter (4). Said voltage limit (U2) is applied to a flame sensing device (7) which operates by means of the rectifying effect of a flame, and through which a current (i) flows, especially when a flame (6) is present. An asymmetric voltage limit (U2) can be defined by said voltage limiter (4), said limit being then applied to the sensing device (7).

REFERENCES:
patent: 3378733 (1968-04-01), Jensen
patent: 5899683 (1999-05-01), Nolte et al.
patent: 1230165 (1966-12-01), None
patent: 1815968 (1969-08-01), None
patent: 59-217417 (1984-12-01), None

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